Remove some bad files when generating an ANGLE roll into Android

Add a list of files that should be removed when rolling ANGLE into
Android. The jsoncpp OWNERS file fails to upload to the Android gerrit
because it contains owners that have never signed into the Android
gerrit.

BUG=b:150892231

Change-Id: I699dada53cdda2fbd012733a7a91eb8b5fb79d35
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2152668
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Tim Van Patten <timvp@google.com>

scripts/roll_aosp.sh

@@ -76,4 +76,13 @@ for dep in ${deps[@]}; do
     git add -f $dep
 done
 
+extra_removal_files=(
+    # The jsoncpp OWNERS file contains users that have not logged into the Android gerrit so it fails to upload.
+    "third_party/jsoncpp/OWNERS"
+)
+
+for removal_file in ${extra_removal_files[@]}; do
+    git rm $removal_file
+done
+
 git commit --amend --no-edit